Odoriferous liquid leaking into their bathroom
I was out of town for months. After I came back, I was told that odoriferous liquid leaked into bathroom of apartment unit downstair. Since no one was at my apartment, it could not be smell of pee, etc. Also they did not state how much water was leaking, but they claimed water damage to bathroom and hall way (which I tiled throughout). I had new bathroom and hallway rugs when I left, and they were still new without any sign of water leaking.
They claimed they called police and fire department due to emergency situation. They claimed the leak that apparently was caused by our toilet (before they entered), and fire department forced in "for the purpose of repairing".
What kind of toilet problem would cause - 1. odoriferous liquid leaking 2. enough to damage whole bathroom and hallway downstair 3. when no one has been using the toilet for 3 weeks?
Any suggestion would be appreciated. Thanks